\begin{fmffile}{hWW}
\begin{fmfgraph*}(100,100)
\fmfleft{i1}
\fmfright{o2,o1}
\fmfdot{v1}
\fmf{dots}{i1,v1}
\fmf{boson,label=$p_2$}{v1,o2}
\fmf{boson,label=$p_1$}{v1,o1}
\fmflabel{\small{$h$}}{i1}
\fmflabel{\small{$W^-$}}{o1}
\fmflabel{\small{$W^+$}}{o2}
\end{fmfgraph*}
\end{fmffile}
